"A long habit of not thinking a thing wrong gives it a superficial appearance of being right." - Thomas Paine
Just because other Presidents have had Czars doesn't mean it's right or constitutional.
Many of the "czars" are people working in the Executive Office of the President. Is the existence of the EOP unconstitutional?
The Czars aren't confirmed by the Senate, and are therefore unconstitutional.
Go back and read earlier on this very page.